Alert archive / Ohio / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 32, NWS Cleveland, OH

May 4, 2012Knox County, Morrow County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at May 4, 2012, 6:42 PM EDT for Knox County, Morrow County, Ohio. It was in force for 33 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 4, 2012, 6:42 PM EDT (22:42 UTC)
Expired: May 4, 2012, 7:15 PM EDT
In force: 33 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

Counties Knox County, OH, Morrow County, OH

The radar

The Cleveland radar (KCLE), 131 km from the middle of the area, began a volume at 22:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 4, 6:45 PM EDT	HAIL 1	5 Ne Marengo, OH	NICKEL TO QUARTER SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.7 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 476 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

812 
WUUS51 KCLE 042242
SVRCLE
OHC083-117-042315-
/O.NEW.KCLE.SV.W.0032.120504T2242Z-120504T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
642 PM EDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN KNOX COUNTY IN NORTH CENTRAL OHIO
  SOUTHEASTERN MORROW COUNTY IN NORTH CENTRAL OHIO

* UNTIL 715 PM EDT

* AT 637 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  NORTHWEST OF SPARTA...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SPARTA...
  CHESTERVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4031 8261 4037 8289 4055 8284 4053 8253
TIME...MOT...LOC 2241Z 286DEG 8KT 4045 8280

$$

ABAIR

2 follow-up statements

244 
WWUS51 KCLE 042300
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
700 PM EDT FRI MAY 4 2012

OHC083-117-042315-
/O.CON.KCLE.SV.W.0032.000000T0000Z-120504T2315Z/
KNOX OH-MORROW OH-
700 PM EDT FRI MAY 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN MORROW AND WESTERN KNOX COUNTIES...

AT 656 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR MARENGO...MOVING SOUTHEAST AT 10 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...SPARTA.

LAT...LON 4039 8287 4049 8282 4047 8257 4031 8262
      4035 8277
TIME...MOT...LOC 2259Z 317DEG 10KT 4040 8276

$$

WILLARD

359 
WWUS51 KCLE 042316
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
716 PM EDT FRI MAY 4 2012

OHC083-117-042326-
/O.EXP.KCLE.SV.W.0032.000000T0000Z-120504T2315Z/
KNOX OH-MORROW OH-
716 PM EDT FRI MAY 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORROW AND
WESTERN KNOX COUNTIES EXPIRED AT 715 PM EDT...

LAT...LON 4039 8287 4049 8282 4047 8257 4031 8262
      4035 8277
TIME...MOT...LOC 2300Z 317DEG 10KT 4040 8276

$$

WILLARD

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 3, 10:49 PM EDT	Special Marine Warning	CLE		100 min
May 4, 7:49 PM EDT	Areal Flood Advisory	CLE	Trumbull	3 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.